In the complex with formula `MCl_(3).4H_(2)O` the co-ordination number of the metal M is six. And there is a no molecule of hydration in it. The volume of 0.1 M `AgNO_(3)` solution needed to precitate the free chloride ions in 200 ml of 0.01 M solution of the complex is

Options

A. 40 ml
B. 20 ml
C. 60 ml
D. 80 ml

Answer

B

Explanation

The complex with formula `MCl_(3). 4H_(2)O`, with no molecule of hydration is `[MCl_(2) (H_(2)O)_(4)]Cl`, so one chlorine is ionisable.
`:.` No. of equivalent of `Ag^(+)=` No. of equivalent of `Cl^(-)` in solution `=0.1xxV=200xx0.01`
`:. V=2/0.1=2-` ml